How many jumping jacks do you have to do to lose one pound?

It takes about six or seven jumping jacks for a 150 pound person to burn one calorie. Going off of the "3500 calorie rule" (which is now known to be completely false because weight loss varies depending on metabolism and body composition among other things), this means that that person would have to do about 21,000 jumping jacks at minimum to lose one pound of weight.

Of course, this isn't a hard and fast rule for everyone. A 200 pound person, for example, may burn a calorie every 5 jumping jacks, meaning only 17,500 jumping jacks are needed. A 125 pound person might need to do 8 or 9 jumping jacks to burn a calorie, meaning they might need as many as 32,500 jumping jacks to burn 3500 calories.

And losing a pound of fat isn't as simple as burning 3500 calories, unfortunately. Everyone deals with a calorie deficit differently. And the closer someone is to a sort of weight equilibrium, the less weight they will lose. That is simply a matter of diet and metabolism.

But, if you are looking for a short answer, an average person may need at least 20,000 jumping jacks before they lose a pound of fat.